Definition: In this task, you are given a text from a post. Your task is to find all of the proper nouns and label them. The labels are <B-PER>, <I-PER> for persons; <B-ORG>, <I-ORG> for organizations; <B-LOC>, <I-LOC> for locations; and <B-MISC>, <I-MISC> for other nouns. The capital 'B' denotes the first word of a proper noun phrase. The capital 'I' denotes all following words of the same noun phrase. If a word is not a part of a proper noun phrase, do not label it.
Input: Sampras opens the defence of his U.S. Open crown against David Rikl of the Czech Republic , while top-ranked Graf begins her title defence against Yayuk Basuki of Indonesia . 

Sampras <B-PER> opens the defence of his U.S. <B-MISC> Open <I-MISC> crown against David <B-PER> Rikl <I-PER> of the Czech <B-LOC> Republic <I-LOC> , while top-ranked Graf <B-PER> begins her title defence against Yayuk <B-PER> Basuki <I-PER> of Indonesia <B-LOC> . 